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  1. Sexual behavior of dwarf and normal genotypes in divergent growth lines of chickens

    Contributor(s):: Blohowiak, C. C., Siegel, P. B., Krey, H. P. van

    Comparisons of several reproductive factors were made among dwarf, heterozygous and normal sized birds in lines selected for high (HW) and low (LW) juvenile body weight. Semen concentration (X109/ml) was significantly greater in the HW than in the LW line (5.6 plus or minus 0.3 vs. 4.7 plus or...

  2. Sexual responses of pullets to selection for mating behavior in male chickens

    Contributor(s):: Siegel, P. B., Cook, W. T.

    Bidirectional selection for number of completed matings in cockerels resulted in lines differing in male sexual behaviour. No correlated responses, however, were observed in the sexual behaviour of S12, S13 and S14 generation pullets. The sexual behaviour of females was measured as courtings...

  3. Some observations on the role of behavior in poultry production and future research needs

    Contributor(s):: Maudlin, J. M., Graves, H. B.

    This review includes consideration of sexual behaviour of the domestic fowl in field observations.

  4. The effect of two post-weaning management systems on the social and sexual behaviour of zebu bulls

    Contributor(s):: Macfarlane, J. S.

    Over a 4-yr period, 200 Boran X Sahiwal bulls were reared on an unrestricted system (in a ranch herd of 400 head, comprising mature stud bulls) and 100 on a restricted system (in paddocks and in groups of 4-5 bulls, both remaining unchanged throughout). At about 3 yr of age and 450 kg live...

  5. The importance of the courting behaviour of the boar on the success of natural and artificial matings

    Contributor(s):: Hemsworth, P. H., Beilharz, R. G., Brown, W. J.

    Two studies were carried out at a commercial piggery. In the 1st study, the sexual behaviour of 24 boars of known breeding performance was observed. There was a correlation between the number of times the boar nosed the sides of the female and the CR achieved (0.48, P

  6. The role of behavior in poultry production: a review of research

    Contributor(s):: Siegel, P. B.

    Historically, behaviour has played a subtle but primary role in chicken meat and egg production. Although the implications of behaviour to husbandry practices have become more visible in recent years, research has lagged behind the technological changes which have occurred in poultry production....

  7. The role of behavior in sheep production: a review of research

    Contributor(s):: Gonyou, H. W.

    Sheep production systems vary throughout the world, but many of the limitations and problems of production are universal. The behaviour of sheep may be a limiting factor in some situations, while in others behaviour facilitates the operation. The allocation of spatial resources, grazing behaviour...

  8. The role of behaviour in swine production: a review of research

    Contributor(s):: Fraser, D.

    Scientific literature on pig behaviour and its practical applications was reviewed and discussed. Areas were identified where behavioural research is likely to produce major benefits in productivity. It was noted that some husbandry practices appear to be out of harmony with the behaviour of...

  9. The sexual behaviour in experimentally underfed bulls

    Contributor(s):: Wierzbowski, S.

    Of 8 pairs of identical twins, one brother was fed 500 g protein daily and the other bull 700 g, from 18 mth of age. At 5 yr of age, live weight in the underfed bulls was 235 kg lower than in the others. Sexual behaviour, as assessed by total semen collection time, number of mounts/copulation,...

  10. Activity in a hunted and an unhunted herd of Dall sheep

    Contributor(s):: Singer, F. J., Murphy, E. C., Cooper, B. A., Laing, K. K.

    The activity patterns of Dall sheep rams (Ovis dalli) of various horn size were studied during the rut in 3 herds (1 hunted and 2 unhunted). In all 3 herds, rams with horns that were superscript 3/4-curled and smaller rams were less frequently seen in ewe bands as the rut progressed. In 1 herd in...

  11. Differences in the sexual "attractiveness" of oestrous ewes to rams

    Contributor(s):: Tilbrook, A. J., Lindsay, D. R.

    The experiments tested the hypotheses that oestrous ewes differ in sexual attractiveness to rams, that different rams will rank ewes in a similar order of attractiveness, that rams will rank ewes similarly for attractiveness the next time the ewes are in oestrus, and that the soliciting behaviour...

  12. Disruptive mating behaviour by subadult Armenian wild sheep in Iran

    | Contributor(s):: Valdez, R., Cardenas, M., Sanchez, J.

    The mating behaviour of isolated populations of Armenian wild sheep (Ovis orientalis gmelini) and Transcaspian urial (Ovis orientalis arkal) was studied during the rutting season in Dec. 1972, and Nov. and Dec. 1973 resp. Males were grouped into 2 age classes, <=4 and >=5 yr. Typically,...

  13. Effect of social conditions during rearing on mating behaviour of gilts

    | Contributor(s):: Soede, N. M., Schouten, W. G. P.

    28 gilts were studied from an av. age of 137 days. Ten gilts were housed individually, having neither tactile nor visual contact with other pigs. The remaining 18 gilts were housed in pairs and had additional contact with gilts in adjacent pens and daily boar contact from 180 days of age. At the...

  14. Effect of training ram hoggets on their adult sexual behaviour

    | Contributor(s):: Srivastava, R. S., Mathur, A. K., Kalra, D. B.

    Male and [female] lambs were weaned at 3 months of age and kept in separate flocks. Rams were trained for semen collection at regular intervals between 6 and 18 months of age, using an artificial vagina on an oestrogen-injected ewe (group 1), or screened for semen quality but not trained (group...

  15. Effects of individual vs. group rearing on the sexual behaviour of prepuberal beef bulls: mount orientation and sexual responsiveness

    | Contributor(s):: Silver, G. V., Price, E. O.

    Ten Hereford bulls were reared from birth in 2 groups of 5 animals, and 10 bulls were physically isolated in individual pens. At 3, 4.5 and 6 months of age, they were all exposed to adult oestrous [female][female]. Individually-raised bulls initially exhibited a significantly higher proportion of...

  16. Genetic correlation of ram sexual performance with ewe reproductive traits of four sheep breeds

    | Contributor(s):: Snowder, G. D., Stellflug, J. N., Vleck, L. D. van

    Rams express differences in sexual performance during the breeding season. Breeding rams with high sexual performance scores as measured during a sexual performance test can improve flock fertility. Whether selecting rams for high sexual performance score will indirectly improve ewe reproductive...

  17. Mounting efficiencies, courtship behaviour and mate preference of boars under multi-sire mating

    | Contributor(s):: Tanida, H., Murata, Y., Tanaka, T., Yoshimoto, T.

    The mating behaviour of boars over a 72-h period in summer was studied. Four groups, each of 2-4 boars, were placed in a pen with 4 oestrous and 4 anoestrous sows. Boars often mounted sows in oestrus, but rarely attempted to mount anoestrous sows. The number of mounts varied among boars in a pen....

  18. Parallel changes in the proceptive and receptive behaviour of the ewe

    | Contributor(s):: Tilbrook, A. J., Hemsworth, P. H., Topp, J. S., Cameron, A. W. N.

    In the 1st of 3 experiments, ovariectomised ewes that had received no hormonal treatment (non-oestrous ewes) were observed for 2 min every 4 h for 40 h in a T-maze that contained flockmate ewes in one arm and rams in the other arm. The non-oestrous ewes spent almost 80% of the time in the maze...

  19. Physical and behavioural factors affecting the sexual "attractiveness" of the ewe

    | Contributor(s):: Tilbrook, A. J.

    In the 1st of 2 experiments, groups of 6 oestrous ewes that had been assigned to 1 of 3 mating treatments were presented to 10 rams and ranked for sexual attractiveness. Two ewes in each group were new, unmated and were recently in oestrus (U), another 2 were new and had been mated by some other...

  20. Relationships between social behaviour and mounting activity of Zebu cattle ( Bos indicus )

    | Contributor(s):: Solano, J., Orihuela, A., Galina, C. S., Montiel, F., Galindo, F.

    To identify which of the behavioural signs occurring around oestrus might be relevant for improving oestrous detection and to identify a possible pattern among these signs for use in predicting mounting behaviour in Bos indicus, a herd of 18 Brahman cows were continuously observed for 40 days....